Dsalta Node.js SDK

Official Node.js SDK for Dsalta API - File hashing and verification service.

Installation

npm install dsalta-node-sdk
# or
yarn add dsalta-node-sdk

Usage

JavaScript

const Dsalta = require("dsalta-node-sdk").default;

const dsalta = new Dsalta({
  apiKey: "your-api-key",
  baseUrl: "https://api.dsalta.com", // Required
  timeout: 5000 // Optional, defaults to 5000ms
});

async function example() {
  const result = await dsalta.hashFile("./document.pdf", {
    author: "John Doe",
    department: "Legal",
  });

  console.log("File:", result.file);
  console.log("File type:", result.fileType);
  console.log("Metadata:", result.data.metadata);
}

example();

TypeScript

import Dsalta from "dsalta-node-sdk";
import { FileMetadata } from "dsalta-node-sdk";

const dsalta = new Dsalta({
  apiKey: "your-api-key",
  baseUrl: "https://api.dsalta.com", // Required
  timeout: 5000 // Optional, defaults to 5000ms
});

async function example() {
  const metadata: FileMetadata = {
    author: "John Doe",
    department: "Legal",
  };

  const result = await dsalta.hashFile("./document.pdf", metadata);
  console.log("File:", result.file);
  console.log("File type:", result.fileType);
  console.log("Metadata:", result.data.metadata);
}

example();

API Reference

Constructor

new Dsalta(config: DsaltaConfig)

Configuration options:

• apiKey (required): Your Dsalta API key
• baseUrl (required): The base URL for the Dsalta API
• timeout (optional): Request timeout in milliseconds (default: 5000)

Methods

hashFile(file, metadata?)

Hash a file with optional metadata.

Parameters:

• file: File to hash (can be a file path string, Buffer, or ReadStream)
• metadata (optional): Object containing metadata to attach to the hash

Returns: Promise

The response includes:

• success: boolean indicating if the operation succeeded
• file: Original File object
• filename: Name of the processed file
• fileType: MIME type of the file
• timestamp: ISO timestamp of the operation
• data: Contains hash and metadata (when success is true)
• error: Contains error details (when success is false)

Example Response

Success case:

{
  success: true,
  timestamp: '2024-02-19T19:19:46.776Z',
  file: File,
  filename: 'document.pdf',
  fileType: 'application/pdf',
  data: {
    hash: 'abc123...',
    metadata: {
      author: 'John Doe',
      department: 'Legal'
    },
    base64File: 'base64EncodedContent...'
  }
}

Error case:

{
  success: false,
  timestamp: '2024-02-19T19:19:46.776Z',
  file: File,
  filename: 'document.pdf',
  fileType: 'application/pdf',
  error: {
    message: 'API authentication failed',
    status: 401,
    code: 'AUTH_ERROR'
  }
}

License

MIT